/Engine/Source/Editor/UnrealEd/Public/WorkflowOrientedApp/WorkflowTabManager.h
Retrieves the history currently visible in this tab
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< struct [FGenericTabHistory](API\Editor\UnrealEd\WorkflowOrientedApp\FGenericTabHistory) > GetCurrentHistory() const